Apparatus for welding tire and like joints.



H. SIEGMANN.

APPARATUS FOR WELDING TIRE AND LIKE JOINTS.

APPLICATION FILED JAN. 17, 1910.

1,000,350. Patented Aug. 8, 1911.

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HEINRICH SIEGMANN, 0F GROSSENWIEDEN-ON-THE-WESER, GERMANY.

APPARATUS FOR WELDING TIRE AND LIKE JOINTS.

Specification of Letters Patent.

Patented Aug. 8, 1911.

Application filed January 17, 1910. Serial No. 538,478.

To all whom it may concern:

Be it known that I, HEINRICH SIEGMANN, a subject of the German Emperor,residing at Grossenwieden-on-the-Weser, Schaumburg, in Germany, haveinvented a certain new and useful Improvement in Apparatus for lVeldingTire and Like Joints, of which the following is a specification.

The object of this invention is to provide improved means for weldingthe joints of metal tires and other rings formed by bending bands ofmetal.

The invention substantially consists in using two flexible devices, forexample chains, laid respectively around opposite portions of thecircumference of the ring, while that portion of the latter, at whichthe ends of the bent band meet, rests between two abutments placedrespectively within and without the ring, the arrangement of theflexible members being such that by pulling them the ends of the band,previously raised to welding heat, are squeezed together and welded.

The invention is illustrated in the annexed drawings, in which Figure 1is a plan-view of the apparatus, with some parts shown in section. Fig.2 is a plan-view of a modification of the mechanism for pulling thechains.

Referring in the first place to Fig. 1, a and a are two parallel bars orrails forming a track, to which is fixed an upright frame or bearing 6.The latter has a screwthreaded eye, in which works a screw 0, with ahand-wheel d fixed to one end and with its other end rotatably engaginga rider 6 slidable on the track. Two chains f and g are attached to thebearing 5, and the rider 6 carries two rollers h and 11 between whichthe chains pass, the rollers being grooved to serve as guides for thechains. The latter are attached to the shorter arms of two levers 7c andZ, the longer arms of which are engaged with nuts m and a mounted on ascrew 0. The screw 0 has a hand-wheel 0 fixed to it at one end, and isrotatable, but not axially movable, in an eye 0 fixed to the track. Thethread of the screw 0 is right-handed on one side of the eye, andleft-handed on the other side, and

the nuts on and n are at opposite sides of the eye, so that by rotatingthe screw the longer lever-arms are moved toward, or away from, eachother, according to the direction of rotation. Two abutments s and t,having respectlvely a convex and a concave face, are ad ustably fixed tothe track. A support carried by the track has four arms 1; for

supporting the tire a and those parts of the chain which are laid aroundthe circumference of the tire.

The manner of using the apparatus is as follows :-The shorter arms ofthe levers 7c 8 being pressed against the inner circumference of thetire at the joint where the ends of the band meet. The joint having beenraised to welding heat before the tire is placed in position orafterward for example by an electrical heating appliance, the screws 0and 0 are then rotated so that the tire is strongly but evenlycompressed, and the joint of the ring is cleanly welded. If the width ofthe chains is smaller than that of the tire, longitudinally adjustablerests on for the chains are preferably provided on the supporting arms*0, so that the chains bear against the central part of the tireband.

In the modification shown in Fig. 2 the levers Is and Z to which thechains f and g are attached, are actuated by means of a hand-lever 1",pivoted at r to the track a a The lever 1" is connected to the levers 70and Z by links p and g respectively, the connection being such that bymoving the lever 1' as indicated in the drawing by the arrow the ends ofthe chains are drawn together by the shorter arms of the levers I0 and ZWhat I claim as my invention and desire to secure by Letters Patent ofthe United States is 1. In means for welding tires and similar annularbodies, the combination of two chains, means for adjustably fixing oneend of each chain, means for drawing together the other ends of saidchains, and a pair of ides between which the ends of the tire or body tobe welded are adapted to be placed.

2. In means for welding tires and similar annular bodies the combinationof two chains, means for adjustably fixing one end Of each chaincomprising a rider movable upon said chains, means for drawing togetherthe other ends of said chains,'and a pair of guides between which theends of the tire or body to be welded are adapted to be placed. 7

3. In means for welding tires and similar annular bodies the combinationof two chains, means for adjustably fixing one end of each chaincomprising a rider movable upon said chains, a bearing and a screwthreaded into said bearing: and engaging said rider, means for drawingtogether the I other ends of said chains, and a pair of guides betweenwhich the ends of the tire or body to be welded are adapted to beplaced.

4. In means for welding tires and similar Copies of this patent may beobtained for five cents each, by addressing Washington; D. G.

annular bodies the combination of two rails, a tire support comprisingarms carried by said rails, a frame on said rails, a rider movable onsaid rails between Athe frame and the tire support, a pair of chainsattached to said frame at one end and means for drawing together theother ends of said chains.

In witness whereof I have signed this of two witnesses.

HEINRICH SIEGMANN.

Witnesses:

P. v. BiiLow, o ROBERT J. THOMPSON.

the Commissioner of iPatents,

